(19)
(11) EP 2 030 788 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
06.01.2010 Bulletin 2010/01

(43) Date of publication A2:
04.03.2009 Bulletin 2009/10

(21) Application number: 08163585.6

(22) Date of filing: 03.09.2008
(51) International Patent Classification (IPC): 
B41J 2/045(2006.01)
 B41J 2/21(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA MK RS

(30) Priority: 03.09.2007 JP 2007228282

(71) Applicant: Canon Kabushiki Kaisha
Tokyo 146-8501 (JP)

(72) Inventors:
  • Uemura, Hiroshi
    Ohta-ku Tokyo (JP)
  • Nakanishi, Hideki
    Ohta-ku Tokyo (JP)

(74) Representative: Garner, Jonathan Charles Stapleton et al
Canon Europe Ltd
3 The Square Stockley Park Uxbridge Middlesex UB11 1ET
3 The Square Stockley Park Uxbridge Middlesex UB11 1ET (GB)

   


(54) Inkjet printing apparatus and processing method therefor


(57) A printing apparatus prints by scanning a print head (211) having the first nozzle array (401 to 412) of a plurality of nozzles corresponding to the first dot size and the second nozzle array (401 to 412) of a plurality of nozzles corresponding to the second dot size different from the first dot size. Each nozzle array (401 to 412) has a plurality of groups each formed from a plurality of nozzles. The printing apparatus includes a print buffer for holding multi-valued data. A predetermined number of multi-valued data in the scanning direction of the print head (211) are read out for each group from the print buffer. Dot data corresponding to a nozzle included in each nozzle array is generated from readout multi-valued data. The generated dot data is transferred to the print head (211).







Search report